102results about "Duplicating using pressure" patented technology

There are described novel rhodol dye compounds The dye compounds exhibit a first color when in the crystalline form and a second color, different from the first color, when in the liquid, amorphous form.

A method for detecting damage to an article caused by exposure to pressure is provided. The article is covered by a pressure sensitive material comprising at least one dye and at least one activator. As the article is exposed to pressure, the pressure sensitive material undergoes a color change in response to exposure to a pressure wherein the article is damaged.

The invention describes a color-developing composition that contains at least three major components: (1) a leuco dye or a combination of leuco dyes, (2) an color-developer or a combination of color-developers that can form colored complexes with the leuco dyes, and (3) a desensitizer to temporarily remove the effect of the developer so the leuco dye appears in its colorless form. An optional binder may be included so that the composition may be applied to a substrate as an ink. The ink composition may be applied to synthetic polymeric substrates and other substrates that are incorporated into absorbent articles or personal care products.

A urea-urethane compound having one or more urea groups and one or more urethane groups in the molecular structure, the number of said urea groups (A) and the number of said urethane groups (B) satisfying the following numerical formula:

10≧(A+B)≧3

wherein each of A and B is an integer of 1 or more.

A reveal substrate includes a sensitive substrate having an opaque polymer sensitive to application of one of heat and pressure which upon one of being heated to a predetermined temperature and subjected to a predetermined pressure causes the opaque polymer to become transparent and a color material disposed in relation to the substrate in a manner to be obscured by the opaque polymer prior to one of the application of the predetermined heat and the predetermined pressure and is revealed subsequent thereto. A method of printing employing the reveal substrate is also provided.

A method of invisible ink fabrication. A first ink having an activator without a leucodye is prepared. A second ink having a leucodye is prepared without an activator, which is combined with the first ink prior to color development and prior to printing. Preferably, the combined ink is printed immediately after being created. Further disclosed are items created using the ink such as toys, puzzles, stickers, coloring books, tags, labels and security devices.

A fine particle which contains a compound represented by formula (1):

wherein R^1a and R^1b may be the same or different, and each independently represent an alkyl group, an aryl group, or a heteroaryl group; R² and R³ each independently represent a hydrogen atom or a substituent, and at least one of R² and R³ is an electron withdrawing group; R² may be bonded to R³ to form a ring; R⁴ represents a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, a substituted boron, or a metal atom; and R⁴ may be covalently bonded or coordinately bonded to at least one among R^1a, R^1b and R³.

The present invention relates to methods of producing color change in overlapping layers of material. The method comprises providing a first layer having a first activatable colorant and a second layer having a second activatable colorant. A first external stimulus is applied to activate the first activatable colorant and produce a first activated color region in the first layer. A second external stimulus is applied to activate second activatable colorant and produce a second activated color region in the second layer.

A recording mark train is formed in an optical recording medium including a noble metal oxide layer by decomposing a noble metal oxide and deforming the noble metal oxide layer. Noble metal particles are irreversibly deposit in the noble metal oxide layer formed with the recording mark train and a laser beam for reproducing data is irradiated onto the thus deposited noble metal particles, thereby reading the recording mark train. The recording mark train includes at least one recording mark having a length shorter than 0.37λ/NA wherein λ is the wavelength of the laser beam and NA is an optical system for irradiating the laser beam. According to the present invention, in the case of recording and reproducing a recording mark having a size smaller than the resolution limit or a recording mark having a size equal to or larger than the resolution limit but close to the resolution limit in this manner, a high reproduction output can be obtained and a high reproduction durability can be achieved for each of the all recording marks in the recording mark train.

A multicolor recording medium, recording method and device using the same are disclosed. The multicolor recording medium includes a substrate having top and bottom surfaces and a photosensitive decoloring layer. A low-temperature thermosensitive coloring layer is disposed on the top surface of the substrate. A high-temperature thermosensitive coloring layer is disposed on the low-temperature thermosensitive coloring layer.

A process for the manufacture of mixtures of fluoran compounds by the reaction of keto acids of formula (II) with a compound of formula (III) in the presence of a dehydrating condensation agent, wherein R1 and R2 independently represent hydrogen; an alkyl of 1-18 carbon, a secondary alkyl with respect to the carbon atom bonded to the nitrogen atom of 3-13 carbon atoms, a cycloalkyl of 4-8 carbon atoms or a phenyl, both of which may be substituted by at least one substituted selected from the group consisting of halogen atoms and alkyls having 1-4 carbon atoms, an aralkyl of 7-10 carbon atoms; or R1 and R2, together with the adjacent nitrogen atom from a heterocyclic ring; R3 is hydrogen, an alkyl of 1-4 carbon atoms, an alkoxy of 1-4 carbon atoms, a phenyl; a substituted phenyl or a halogen; R4 is an alkyl group of 1-18 carbon atoms, a carboxyalkyl of 1-18 carbon atoms, a carboxycycloalkyl of 4-8 carbon atoms, an alkylamino of 1-18 carbon atoms, a cycloalkylamino of 4-8 carbon atoms, a dialkylamino or dicycloalkylamino; an arylamino, a substituted arylamino; an aralkylamino of 7-10 carbon atoms; a diaralkylamino; R5 is an alkyl of 1-18 carbon atoms, a carboxy alkyl of 1-18 carbon atoms or a halogen and R6 is hydrogen or alkyl of 1-4 carbon atoms.